17-(1,5-Dihydroxy-1,5-dimethyl-2-oxo-3-hexenyl)-2-hydroxy-4,4,9,14-tetramethylestra-1,5-dien-16-yl 2,4-di-O-acetylpentopyranoside AIDS-130877 AIDS130877 Desfontainoside A NSC615483